Pacific service magazine . ow sheet of charcoal process, showing operations and materials of manufacture. southern boundary of the property, orover the railroad spur on the northernboundary. Only a small percentage ofthese raw materials was received via thewater route. From the railroad cars the fruit pitswere discharged by hand labor overscreens to remove dirt, gravel, etc., ontoa belt conveyor having a carryingcapacity of 50 tons per hour, which con-veyor carried the pits either to the bucketelevator which discharged the raw ma- draw pits from the storage piles, theportable conveyors were re
Pacific service magazine . ow sheet of charcoal process, showing operations and materials of manufacture. southern boundary of the property, orover the railroad spur on the northernboundary. Only a small percentage ofthese raw materials was received via thewater route. From the railroad cars the fruit pitswere discharged by hand labor overscreens to remove dirt, gravel, etc., ontoa belt conveyor having a carryingcapacity of 50 tons per hour, which con-veyor carried the pits either to the bucketelevator which discharged the raw ma- draw pits from the storage piles, theportable conveyors were reversed, deliv-ering the pits to the stationary conveyorsystem and then into the building. The fuel utilized at the plant, both forthe manufacture of producer gas and forthe generation of steam in the boiler plant,was the by-product lampblack from thePotrero Works of the Pacific Gas andElectric Company. About ton oflampblack was used for the manufac-ture of producer gas per ton of charcoal Pacific Sr:nvicE Magazine 311. Railioiiil spur built in by Company C, 319th Engi-neers, U. S. A. produced and approximately lialf thatquantity per ton of charcoal was requiredfor the generation of steam. In starting up a carbonizing unit astrong fire of lampblack was made inthe generators. When the fire bed, whichwas usually four and one-half to five feetin depth, was of sufficiently even tem-perature throughout, steam was intro-duced under it and the resulting producergas was conducted through over to theretorts. During the blasting operation the wastegases were carried over also to the re-torts and the sensible heat of these com-bustion gases was sufficient to heat upthe fire-brick lining of the retort cham-ber. When a point was reached, asjudged by the operator, where the tem-perature of the retort chamber walls wassufficient to ignite the producer gas, theair blast was would thentake place and the heat-ing gases following adowndraft would bringthe castiron retort
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Keywords: ., bookauthorpacificg, bookcentury1900, bookdecade1910, bookyear1912
